EP0544146A1 - Clamping device for workpieces - Google Patents

Clamping device for workpieces Download PDF

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Publication number
EP0544146A1
EP0544146A1 EP92119251A EP92119251A EP0544146A1 EP 0544146 A1 EP0544146 A1 EP 0544146A1 EP 92119251 A EP92119251 A EP 92119251A EP 92119251 A EP92119251 A EP 92119251A EP 0544146 A1 EP0544146 A1 EP 0544146A1
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EP
European Patent Office
Prior art keywords
clamping device
plate
plates
workpieces
screw
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP92119251A
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German (de)
French (fr)
Inventor
Helmut Christmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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Filing date
Publication date
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Publication of EP0544146A1 publication Critical patent/EP0544146A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/006—Supporting devices for clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/16—Details, e.g. jaws, jaw attachments
    • B25B5/166—Slideways; Guiding and/or blocking means for jaws thereon

Definitions

  • the invention relates to a clamping device for workpieces to align them for machining.
  • the present invention is therefore based on the object of specifying a clamping device for workpieces, by means of which simple and precise positioning of a workpiece to be machined is made possible.
  • the clamping device according to the invention is characterized by three plates arranged one above the other. Two adjacent plates are connected to each other via a joint. The two articulated connections are offset by 90 ° to each other. Furthermore the clamping device according to the invention has means for setting an angle between the adjacent plates. As a result, a structurally simple and robust clamping device is realized while maintaining the required angular positions.
  • This configuration of the clamping device enables alignment of a workpiece around the coordinate axes X-Y.
  • the clamping device is simple and robust.
  • the positioning can be further improved if the top plate has a lockable adapter that can be swiveled around a C axis. This allows the workpiece to be adjusted in all degrees of freedom.
  • the angle adjustment is advantageously carried out by means of screws, the respective screw being supported on the end face on the corresponding adjacent plate. This design ensures high reliability and accuracy, since the thread pitch of the screws can be selected accordingly.
  • the angle adjustment is advantageously carried out against a spring force. This has the advantage that the corresponding plate should be pressed into the zero position due to a spring force.
  • the spring force also has the further advantage that any play in the thread is eliminated due to the spring force, so that there are no angular fluctuations.
  • a compression spring preferably a spring assembly consisting of disc springs. This has the advantage that in the event of the spring or a disc spring breaking, the functionality continues to be guaranteed.
  • the adjustment of the adapter in the desired position on the plate is advantageously carried out by means of two set screws and the fixing with clamping screws.
  • the set screws are advantageously conical screws.
  • the joints of the adjacent plates connected to one another advantageously lie in the edge region of the plates, so that the joints do not influence the adjustable angle.
  • the plates can rest on each other in a zero position.
  • the clamping device for workpieces is used to align them, e.g. by means of a dial gauge, for its processing from three successive plates, namely a plate - central plate - with which the central plate 1 is articulated to a plate 5 - base plate - via a joint 4 lying on the edge in the direction of the X axis, as schematically shown in FIG. 5 shows.
  • the base plate 5 is applied to a stand part 7 by means of a dovetail guide 6 and can be braced against it by a lateral tightening finger 8 via a screw suit 9 against the action of a spring 10, as shown in FIG. 1.
  • connection of the device with a device is freely selectable. This is also an advantage, since machining devices can also be retrofitted with the device according to the invention.
  • the center plate 1 with articulated connection 4 to the base plate 5 is held on this (5) by means of spring assemblies 11 comprising a plurality of disc springs and tightening screws 12 and can be raised by means of a pressure screw 13 in the wine cell relative to this (5) when retrieved by the spring assemblies 11, as shown in FIGS. 1 and 2 show.
  • the mounting plate 3 with the articulated connection 2 to the central plate 1 is comprised of a plurality of disc springs with tightening screws 15 by means of spring assemblies 14 on this (1) held and raised by means of a pressure screw 16 at an angle relative to this (1) when retrieved by the spring assemblies 14, as shown in FIGS. 1 and 2.
  • This provides the setting for the mounting plate 3 in two planes perpendicular to each other.
  • pressure screws 13 and 16 are used to counteract spring action 11 and 14.
  • an adapter 17 for a workpiece 18 is set in the desired rotational position about an axis of rotation C by means of two cone screws 19 and the fixing with clamping screws 20, as shown in FIGS. 3 and 4.
  • the axis of rotation C is formed here by a screw 21 with a central bearing 22 and a screw head nut 23, the screw 21 with head 24 holding the adapter 17 under the action of a spring 25 against the underside of the mounting plate 3, as shown in FIG. 1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)

Abstract

The invention relates to a clamping device for workpieces so that they can be aligned for machining. The clamping device has three plates (1; 3; 5) which are arranged one above the other. Two plates (1; 3 and 3; 5) which are respectively arranged adjacent to one another are in each case connected to one another by means of a articulation (2; 4). The articulation connections (2; 4) are arranged so as to be offset by 90 DEG in relation to one another. Furthermore, the clamping device has means (16) for the setting of an angle between the adjacent plates (1; 3; 5) in each case. <IMAGE>

Description

Die Erfindung bezieht sich auf eine Einspanneinrichtung für Werkstücke zu deren Ausrichtung für die Bearbeitung.The invention relates to a clamping device for workpieces to align them for machining.

Die herkömmlichen Spanneinrichtungen mit zueinander bewegbaren Elementen sind vielfach zu ungenau in der Einstellung und im allgemeinen auch schwierig in der Bedienung zur notwendigen Ausrichtung des eingespannten Werkstücks mittels Meßuhr zur maß- und winkelgenauen Bearbeitung, wobei hier vorallem die Einzelteilfertigung und nicht die Computerfertigung in Serie angesprochen ist, wie solche vorallem in handwerklichen Betrieben nach wie vor erforderlich ist.The conventional clamping devices with mutually movable elements are often too imprecise in the setting and in general also difficult to operate for the necessary alignment of the clamped workpiece by means of a dial gauge for dimensionally and angularly accurate machining, whereby here the individual part production and not the computer production in series is addressed how such is still required, especially in craft businesses.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde eine Einspannvorrichtung für Werkstücke anzugeben, mittels derer eine einfache und genaue Positionierung eines zu bearbeitenden Werkstückes ermöglicht wird.The present invention is therefore based on the object of specifying a clamping device for workpieces, by means of which simple and precise positioning of a workpiece to be machined is made possible.

Diese Aufgabe wird durch eine Einspanneinrichtung für Werkstücke zu deren Ausrichtung für eine Bearbeitung mit den im kennzeichnenden Teil des Anspruchs 1 angegebenen Merkmalen gelöst. Vorteilhafte Weiterbildungen sind Gegenstand der Unteransprüche.This object is achieved by a clamping device for workpieces to align them for processing with the features specified in the characterizing part of claim 1. Advantageous further developments are the subject of the dependent claims.

Zur Vereinfachung der Ausrichtung und zur Erzielung einer genauen Ausrichtung einzeln einzuspannender Werkstücke, welche bearbeitet werden sollen, kennzeichnet sich die erfindungsgemäße Einspanneinrichtung durch drei übereinander angeordnete Platten. Jeweils zwei benachbarte Platten sind über jeweils ein Gelenk miteinander verbunden. Die beiden Gelenkverbindungen sind um 90° zueinander versetzt angeordnet. Desweiteren weist die erfindungsgemäße Einspanneinrichtung Mittel zur Einstellung jeweils eines Winkels zwischen den benachbarten Platten auf. Hierdurch wird eine konstruktiv einfache und robuste unter der Einhaltung der geforderten Winkellagen Einspanneinrichtung verwirklicht.To simplify the alignment and to achieve a precise alignment of individually clamped workpieces that are to be machined, the clamping device according to the invention is characterized by three plates arranged one above the other. Two adjacent plates are connected to each other via a joint. The two articulated connections are offset by 90 ° to each other. Furthermore the clamping device according to the invention has means for setting an angle between the adjacent plates. As a result, a structurally simple and robust clamping device is realized while maintaining the required angular positions.

Durch diese Ausbildung der Einspanneinrichtung wird eine Ausrichtung eines Werkstückes um die Koordinatenachsen X-Y ermöglicht. Die Einspanneinrichtung ist einfach und robust aufgebaut.This configuration of the clamping device enables alignment of a workpiece around the coordinate axes X-Y. The clamping device is simple and robust.

Die Positionierung kann noch weiter verbessert werden, wenn die oberste Platte einen um eine C-Achse verschwenkbaren arretierbaren Adapter aufweist.. Damit kann das Werkstück in allen Freiheitsgraden eingestellt werden.The positioning can be further improved if the top plate has a lockable adapter that can be swiveled around a C axis. This allows the workpiece to be adjusted in all degrees of freedom.

Die Winkeleinstellung erfolgt vorteilhafterweise mittels Schrauben, wobei die jeweilige Schraube sich stirnseitig auf die entsprechende benachbarte Platte abstützt. Durch diese Ausbildung wird eine hohe Zuverlässigkeit sowie Genauigkeit erzielt, da die Gewindesteigung der Schrauben entsprechend gewählt werden kann.The angle adjustment is advantageously carried out by means of screws, the respective screw being supported on the end face on the corresponding adjacent plate. This design ensures high reliability and accuracy, since the thread pitch of the screws can be selected accordingly.

Die Winkeleinstellung erfolgt vorteilhafterweise gegen eine Federkraft. Dies hat den Vorteil, daß aufgrund einer Federkraft die entsprechende Platte in die Null-Lage gedrückt werden soll. Die Federkraft hat auch den weiteren Vorteil, daß ein eventuell vorhandenes Spiel im Gewinde aufgrund der Federkraft aufgehoben wird, so daß es keine Winkelschwankungen gibt.The angle adjustment is advantageously carried out against a spring force. This has the advantage that the corresponding plate should be pressed into the zero position due to a spring force. The spring force also has the further advantage that any play in the thread is eliminated due to the spring force, so that there are no angular fluctuations.

Bei der Realisierung dieses Gedankens ist es von Vorteil, wenn eine Druckfeder, vorzugsweise ein Federpaket bestehend aus Tellerfedern, verwendet wird. Dies hat den Vorteil, daß im Falle des Bruchs der Feder bzw. einer Tellerfeder die Funktionsfähigkeit weiterhin gewährleistet bleibt.In realizing this idea, it is advantageous if a compression spring, preferably a spring assembly consisting of disc springs, is used. This has the advantage that in the event of the spring or a disc spring breaking, the functionality continues to be guaranteed.

Die Einstellung des Adapters in der gewünschten Position an der Platte erfolgt vorteilhafterweise mittels zweier Stellschrauben und die Feststellung mit Spannschrauben. Bei den Stellschrauben handelt es sich vorteilhafterweise um Konusschrauben.The adjustment of the adapter in the desired position on the plate is advantageously carried out by means of two set screws and the fixing with clamping screws. The set screws are advantageously conical screws.

Die Gelenke der benachbarten miteinander verbundenen Platten liegen vorteilhafterweise im Randbereich der Platten, so daß die Gelenke den einstellbaren Winkel nicht beeinflussen. Theoretisch können die Platten in einer Nullstellung aufeinander aufliegen.The joints of the adjacent plates connected to one another advantageously lie in the edge region of the plates, so that the joints do not influence the adjustable angle. In theory, the plates can rest on each other in a zero position.

Weitere Vorteile und Merkmale ergeben sich aus der nachfolgenden Beschreibung einer bevorzugten Ausführungsform einer Einspanneinrichtung für Werkstücke und zwar zeigen:

Figur 1 und 2
die Seitenansicht und Frontansicht einer solchen Einspanneinrichtung teilweise aufgeschnitten,
Figur 3 und 4
die Draufsicht und Seitenansicht der Aufnahmeplatte teilweise aufgeschnitten
und
Figur 5
die perspektivische Ansicht der Einspanneinrichtung in schematischer Darstellung.
Further advantages and features result from the following description of a preferred embodiment of a clamping device for workpieces, namely:
Figure 1 and 2
the side and front view of such a clamping device partially cut away,
Figures 3 and 4
the top view and side view of the receiving plate partially cut away
and
Figure 5
the perspective view of the clamping device in a schematic representation.

Wie aus der Zeichnung ersichtl ich wird, beteht die Einspanneinrichtung für Werkstücke zu deren Ausrichtung, z.B. mittels Meßuhr, für deren Bearbeitung aus drei übereinanderfolgenden Platten und zwar einer Platte - Mittelplatte -, mit welcher über eine in richtung X-Achse randseitig liegende Gelenk 4 die Mittelplatte 1 mit einer Platte 5 - Grundplatte - gelenkig verbunden ist, wie Fig. 5 schematisch zeigt.As can be seen from the drawing, the clamping device for workpieces is used to align them, e.g. by means of a dial gauge, for its processing from three successive plates, namely a plate - central plate - with which the central plate 1 is articulated to a plate 5 - base plate - via a joint 4 lying on the edge in the direction of the X axis, as schematically shown in FIG. 5 shows.

Die grundplatte 5 ist mittels Schwalbenschwanzführung 6 auf einem Standteil 7 aufgebracht und durch einen seitlichen Spannfinger 8 über einen Schraubanzug 9 gegen Wirkung einer Feder 10 an diesem (7) verspannbar, wie Figur 1 zeigt.The base plate 5 is applied to a stand part 7 by means of a dovetail guide 6 and can be braced against it by a lateral tightening finger 8 via a screw suit 9 against the action of a spring 10, as shown in FIG. 1.

Eine derartige Befestigung ist an sich bekannt. Die Verbindung der Einrichtung mit einer Vorrichtung ist frei wählbar. Dies ist auch ein Vorteil, da Bearbeitungsvorrichtungen mit der erfindungsgemäßen Einrichtung auch nachträglich ausgestattet werden kann.Such attachment is known per se. The connection of the device with a device is freely selectable. This is also an advantage, since machining devices can also be retrofitted with the device according to the invention.

Die MIittelplatte 1 mit Gelenkverbindung 4 zur Grundplatte 5 ist mittels Federpaketen 11 umfassend mehrere Tellerfedern und Anzugschrauben 12 auf dieser (5) gehalten und über eine Druckschraube 13 im Weinkel gegenüber dieser (5) anhebbar bei Rückholung durch die Federpakete 11, wie Fig. 1 und 2 zeigen. Die Aufnahmeplatte 3 mit Gelenkverbindung 2 zur Mittelplatte 1 ist mittels Federpaketen 14 umfassend mehrere Tellerfedern mit Anzugsschrauben 15 auf dieser (1) gehalten und über eine Druckschraube 16 im Winkel gegenüber dieser (1) anhebbar bei Rückholung durch die Federpakete 14, wie Fig. 1 und 2 zeigen.The center plate 1 with articulated connection 4 to the base plate 5 is held on this (5) by means of spring assemblies 11 comprising a plurality of disc springs and tightening screws 12 and can be raised by means of a pressure screw 13 in the wine cell relative to this (5) when retrieved by the spring assemblies 11, as shown in FIGS. 1 and 2 show. The mounting plate 3 with the articulated connection 2 to the central plate 1 is comprised of a plurality of disc springs with tightening screws 15 by means of spring assemblies 14 on this (1) held and raised by means of a pressure screw 16 at an angle relative to this (1) when retrieved by the spring assemblies 14, as shown in FIGS. 1 and 2.

Hierdurch ist für die Aufnahmeplatte 3 eine einstellung in zwei rechtwinklig zueinander stehende Ebenen gegeben.This provides the setting for the mounting plate 3 in two planes perpendicular to each other.

Zur Verstellung jeweils zweier Platten 1 und 3 bzw. 1 und 5 zueinander in der gewünschten Winkelstellung erfolgen hierbei mittels Druckschrauben 13 bzw. 16 gegen Federwirkung 11 bzw. 14.To adjust two plates 1 and 3 or 1 and 5 to each other in the desired angular position, pressure screws 13 and 16 are used to counteract spring action 11 and 14.

An der Aufnahmeplatte 3 erfolgt schließlich die Eisntellung eines Adapters 17 für ein Werkstück 18 in der gewünnschten Drehstellung um eine Drehachse C mittels zweier Konusschrauben 19 und die Feststellung mit Spannschrauben 20, wie Fig. 3 und 4 zeigen. Die Drehachse C wird hier durch eine Schraube 21 mit Mittellager 22 und Schraubkopfmutter 23 gebildet, wobei die Schraube 21 mit Kopf 24 unter Wirkung einer Feder 25 den Adapter 17 gegen die Unterseite der Aufnahmeplatte 3 hält, wie Figur 1 zeigt.Finally, on the mounting plate 3, an adapter 17 for a workpiece 18 is set in the desired rotational position about an axis of rotation C by means of two cone screws 19 and the fixing with clamping screws 20, as shown in FIGS. 3 and 4. The axis of rotation C is formed here by a screw 21 with a central bearing 22 and a screw head nut 23, the screw 21 with head 24 holding the adapter 17 under the action of a spring 25 against the underside of the mounting plate 3, as shown in FIG. 1.

Claims (7)

Einspanneinrichtung für Werkstücke zu deren Ausrichtung für eine Bearbeitung, dadurch gekennzeichnet, daß drei Platten (1; 3; 5) übereinander angeordnet sind,
daß jeweils zwei benachbarten Platten (1; 3 und 3; 5) über jeweils ein Gelenk (2; 4) miteinander verbunden sind,
daß die Gelenkverbindungen (2; 4) um 90° zueinander versetzt angeordnet sind, und daß Mittel zur Einstellung jeweils eines Winkels zwischen den benachbarten Platten (1; 3 und 3; 5) vorgesehen sind.Clamping device for workpieces for their alignment for processing, characterized in that three plates (1; 3; 5) are arranged one above the other,
that two adjacent plates (1; 3 and 3; 5) are connected to each other via a joint (2; 4),
that the articulated connections (2; 4) are arranged offset by 90 ° to each other, and that means for adjusting an angle between the adjacent plates (1; 3 and 3; 5) are provided. Einspanneinrichtung nach Anspruch 1,
   dadurch gekennzeichnet, daß eine Platte (3 ) einen um eine C-Achse verschwenkbaren, arretierbaren Adapter (17) aufweist.Clamping device according to claim 1,
characterized in that a plate (3) has a lockable adapter (17) which can be pivoted about a C axis. Einspanneinrichtung nach Anspruch 1 oder 2,
   dadurch gekennzeichnet, daß die Mittels jeweils eine Schraube (13; 16) umfassen, wobei die Schraube (13) in der Platte (3) einschraubbar und stirnseitig zur Anlage an die Platte (1) und die Schraube (16) in der Platte (1) einschraubbar und stirnseitig zur Anlage an die Platte (5) ist.Clamping device according to claim 1 or 2,
characterized in that the means each comprise a screw (13; 16), the screw (13) being screwable into the plate (3) and on the end face for engagement with the plate (1) and the screw (16) in the plate (1 ) can be screwed in and is attached to the face of the plate (5). Einspanneinrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Winkeleinstellung gegen eine Federkraft erfolgt.Clamping device according to one of the preceding claims, characterized in that the angle adjustment takes place against a spring force. Einspanneinrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Winkeleinstellung gegen eine Federkraft einer Druckfeder, vorzugsweise eines Federpaketes (11; 14) bestehend aus Tellerfedern, erfolgt.Clamping device according to claim 4, characterized in that the angular adjustment takes place against a spring force of a compression spring, preferably a spring assembly (11; 14) consisting of disc springs. Einspanneinrichtung nach einem der vorstehend genannten Ansprüche, dadurch gekennzeichnet, daß die Einstellung des Adapters (17) in der gewünschten Position an der Platte (3) mittels zweier Stellschrauben (19) und die Feststellung mit Spannschrauben (20) erfolgt.Clamping device according to one of the preceding claims, characterized in that the adapter (17) is set in the desired position on the plate (3) by means of two adjusting screws (19) and the fixing is carried out using clamping screws (20). Einspanneinrichtung nach einem oder mehreren Ansprüche, dadurch gekennzeichnet, daß die Gelenke (2; 4) jeweils im Randbereich der Platten (1; 3 bzw. 1; 5) angeordnet sind.Clamping device according to one or more claims, characterized in that the joints (2; 4) are each arranged in the edge region of the plates (1; 3 or 1; 5).
EP92119251A 1991-11-23 1992-11-11 Clamping device for workpieces Withdrawn EP0544146A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9114638U DE9114638U1 (en) 1991-11-23 1991-11-23
DE9114638U 1991-11-23

Publications (1)

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EP0544146A1 true EP0544146A1 (en) 1993-06-02

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EP92119251A Withdrawn EP0544146A1 (en) 1991-11-23 1992-11-11 Clamping device for workpieces

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DE (1) DE9114638U1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103386659A (en) * 2013-07-19 2013-11-13 吴江市博众精工科技有限公司 Product clamping mechanism
CN104227617A (en) * 2013-06-14 2014-12-24 海洋王（东莞）照明科技有限公司 Clamping and fixing device
CN110587522A (en) * 2019-10-25 2019-12-20 珠海格力智能装备有限公司 Positioning mechanism and guide rail structure

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999030868A1 (en) * 1997-12-17 1999-06-24 Kuka Schweissanlagen Gmbh Clamping device for workpieces
DE202006001505U1 (en) * 2006-02-01 2007-06-14 Staudinger, Karl Holder for a clamping unit

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE132876C (en) *
DE1102312B (en) * 1959-09-10 1961-03-16 Deutsche Edelstahlwerke Ag Device for aligning the electrodes in electrical discharge machines
US3436050A (en) * 1967-05-04 1969-04-01 Dawson Inc Alexander Adjustable mount for optical element
US3596863A (en) * 1969-01-28 1971-08-03 Nasa Fine adjustment mount
EP0271393A1 (en) * 1986-11-21 1988-06-15 Regie Nationale Des Usines Renault Method and device for assembling the constitutive elements of an engine exhaust line
US4875666A (en) * 1987-06-30 1989-10-24 Hain Leonard P Clamp for holding work pieces in the formation of trusses

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE132876C (en) *
DE1102312B (en) * 1959-09-10 1961-03-16 Deutsche Edelstahlwerke Ag Device for aligning the electrodes in electrical discharge machines
US3436050A (en) * 1967-05-04 1969-04-01 Dawson Inc Alexander Adjustable mount for optical element
US3596863A (en) * 1969-01-28 1971-08-03 Nasa Fine adjustment mount
EP0271393A1 (en) * 1986-11-21 1988-06-15 Regie Nationale Des Usines Renault Method and device for assembling the constitutive elements of an engine exhaust line
US4875666A (en) * 1987-06-30 1989-10-24 Hain Leonard P Clamp for holding work pieces in the formation of trusses

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104227617A (en) * 2013-06-14 2014-12-24 海洋王（东莞）照明科技有限公司 Clamping and fixing device
CN104227617B (en) * 2013-06-14 2016-08-24 海洋王（东莞）照明科技有限公司 Clamping and fixing device
CN103386659A (en) * 2013-07-19 2013-11-13 吴江市博众精工科技有限公司 Product clamping mechanism
CN110587522A (en) * 2019-10-25 2019-12-20 珠海格力智能装备有限公司 Positioning mechanism and guide rail structure

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